They might indeed wade in the water, but they could hardly be at home in it, for they were clearly not good swimmers.

We must suppose that they were dry land animals or at most swamp dwellers.
_Dinosaur Footprints._ The ancestors of the Theropoda appear first in the Triassic period, already of large size, but less completely bipedal than their successors.

Incomplete skeletons have been found in the Triassic formations of Germany[5] but in this country they are chiefly known from the famous fossil footprints (or "bird-tracks" as they were at first thought to be), found in the flagstone quarries at Turner's Falls on the Connecticut River, in the vicinity of Boonton, New Jersey, and elsewhere.

These tracks are the footprints of numerous kinds of dinosaurs, large and small, mostly of the carnivorous group, which lived in that region in the earlier part of the Age of Reptiles, and much has been learned from them as to the habits of the animals that made them.

The tracks ascribed to carnivorous dinosaurs run in series with narrow tread, short or long steps, here and there a light impression of tail or forefoot and occasionally the mark of the shank and pelvis when the animal settled back and squatted down to rest a moment.